Chair



FIG. 1 is a perspective view showing my new design for a chair;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a right-side view thereof;

FIG. 5 is a left-side view thereof; and,

FIG. 6 is a top view thereof.

The broken lines showing a support pedestal are for environmental purposes only and form no part of the claimed design. 

The ornamental design for a chair, as shown and described. 